Rei Saiga

Rei Saiga (斎賀 玲), also known as Psyger-0 (サイガー0, Saigā Zero).

One of Shangri-La’s top players. She earned the title “Maximum Firepower” by achieving the highest burst damage in the game. Her in-game avatar is a man covered head-to-toe in legendary equipment, but in the real world she’s a pretty teenage girl who has a crush on Sunraku.

Personality
Rei can be described as "innocent maiden in love". She loves Sunraku, but lacks confidence to tell her feelings.

As Psyger-0 she appears as mysterious, silent warrior that is both inspiring and intimidating.

Trivia
She is head over heels for Sunraku. In manga chapter 82, she asks him to call her by the name Rei. Sunraku still thinks she is a man.